Midland-ACS
OPD Stemsaver
- ¼ turn actuator and on/off valve protection
- Linear actuator and control valve protection
- System instrumentation equipment protection
- Process valve stem & seat saver
- Compliments and protects ESD & safety
instrumented system equipment
Specifically designed for Severe Offshore Environments
Click here for the Full Brochure and Data
Sheet
General Description
The purpose of the OPD “STEMSAVER” is
to protect downstream equipment from over pressure
events including regulator failure, thus preventing
potential damage and downtime. Applications include
the protection of ESD & safety instrumented systems
including positioners, actuators and process valve
stems.
The device includes an integral 3550 series pressure
regulator with a
protection valve and sensor system built into a common
body. Increases in outlet pressure can occur for many
reasons, including failure of key regulator
components. Should this occur the device will automatically
fail-safe within 30 milli-seconds*. The integral valve
will be triggered to shut-off the outlet and either
vent the downstream pressure or trap & lock at
the secondary preset trip pressure level.
The mode of operation can be selected by leaving the
exhaust port of the valve open or plugged. When the
integral valve has deployed, the reset button protrudes
from the housing providing a positive indication that
a fault has occurred; models are also available with
air pilot operators or proximity switches to indicate
the triggered position.
The OPD reduces the potential for damage occurring
from increased torque, thrust or pressure values within
the downstream system. Once the
fault has been corrected the unit can be reset by
pushing the reset button on the unit.
In line with today’s requirements for space
saving, weight reduction and efficiency the system
is all close coupled within a compact body.
*Time stated for 4-8 bar variant; please see specification
for further information regarding lower pressure versions. |
